if lung cancer spreads to the brain, the disease is called metastasis lung cancer because the cells in the secondary tumor resemble abnormal lung cells, not abnormal brain cells. Treatment for secondary brain tumors depends on where the cancer started and the extent of the spread. It also depends on other factors, including the patient’s age, general health and response to previous treatment.
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Lung cancer is a disease which consists of uncontrolled cell growth in tissues of the lung. This growth may lead to metastasis, which is the invasion of adjacent tissue and infiltration beyond the lungs. The vast majority of primary lung cancers are carcinomas, derived from epithelial cells.